From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sricharan R Subject: Re: [v5,08/13] ARM: dts: ipq4019: Add ipq4019-ap.dk07.1 common data Date: Wed, 18 Apr 2018 12:42:18 +0530 Message-ID: <4e687302-6c42-315b-e76d-2274131da3a0@codeaurora.org> References: <1521800336-19266-9-git-send-email-sricharan@codeaurora.org> <1724020.V9x0kZZp2B@bentobox> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <1724020.V9x0kZZp2B@bentobox> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: Sven Eckelmann Cc: robh+dt@kernel.org, robh@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, andy.gross@linaro.org, david.brown@linaro.org, catalin.marinas@arm.com, will.deacon@arm.com, sboyd@codeaurora.org, bjorn.andersson@linaro.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, absahu@codeaurora.org, marc.zyngier@arm.com, richardcochran@gmail.com List-Id: devicetree@vger.kernel.org Hi Sven, On 4/18/2018 12:29 PM, Sven Eckelmann wrote: > On Freitag, 23. März 2018 15:48:51 CEST Sricharan R wrote: >> Add the common data for all dk07 based boards. >> >> Reviewed-by: Abhishek Sahu >> Signed-off-by: Sricharan R >> --- >> arch/arm/boot/dts/qcom-ipq4019-ap.dk07.1.dtsi | 69 +++++++++++++++++++++++++++ >> 1 file changed, 69 insertions(+) >> create mode 100644 arch/arm/boot/dts/qcom-ipq4019-ap.dk07.1.dtsi > > The no-map reserved-memory for tz and smem are missing. Linux doesn't have > control over these regions and they are placed in the middle of the ram before > Linux even starts. And u-boot is also not adding these ranges automatically. > > reserved-memory { > #address-cells = <0x1>; > #size-cells = <0x1>; > ranges; > > smem@87e00000 { > reg = <0x87e00000 0x080000>; > no-map; > }; > > tz@87e80000 { > reg = <0x87e80000 0x180000>; > no-map; > }; > }; > > This can either (depending on HW/SW configuration) lead to a failed boot [1] > or to runtime crashes like: > > root@OpenWrt:/# /tmp/memory-allocator-test > main 0 > [ 571.758058] Unhandled fault: imprecise external abort (0xc06) at 0x01715ff8 > [ 571.758099] pgd = cebec000 > [ 571.763826] [01715ff8] *pgd=8e7fa835, *pte=87e7f75f, *ppte=87e7fc7f > Bus error > > I would not know how to disable QSEE on these boards and thus would assume > that it should be part of this dtsi. As we discussed offline, i agree that the smem and tz reserved memory nodes need to be added. It still boots today without that, but would abort when that memory region is allocated and written. I will add the reserved-memory node for that in V6 along with other comments. Regards, Sricharan -- "QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation